BP12YT DIP Switch SPST 12 Position Equivalent & Substitute Parts

Part Overview

The BP12YT is a slide-actuated DIP switch manufactured by C&K, configured as a 12-position SPST (Single Pole Single Throw) switch rated for 100mA at 5VDC. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and production continuity. The BP12YT features through-hole, right-angle mounting with PC pin termination and is suitable for applications requiring low-voltage switching with sealed terminal construction.

Substiute Parts

BP12YT

C&KIn Stock: 987BP12YT Datasheet

Current PartRFQ

195-12MST

CTS ElectrocomponentsIn Stock: 678195-12MST Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The 195-12MST from CTS Electrocomponents is identified as a substitute for the BP12YT based on the following alignment of critical parameters:

• Circuit Configuration: Both parts are SPST switches
• Number of Positions: Both provide 12-position configuration
• Mounting Type: Both use through-hole, right-angle mounting with PC pin termination
• Pitch: Both maintain 0.100" (2.54mm) full pitch spacing
• Sealed Construction: Both feature epoxy sealed terminals with tape seal
• Washability: Both are washable components
• Compliance: Both are RoHS compliant and REACH unaffected

Substitution is valid where the application voltage and current requirements do not exceed the 195-12MST ratings. The primary difference is the actuator type (piano versus slide) and voltage rating (24VDC versus 5VDC), which must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The 195-12MST is an active product with extended compliance certification (ROHS3), providing supply chain continuity for the obsolete BP12YT. The substitute maintains identical circuit topology, position count, and mechanical footprint compatibility. The 195-12MST demonstrates superior electrical life (2,000 cycles versus 1,000 cycles) and extended operating temperature range (-40°C to 85°C versus -20°C to 60°C).

Selection of the 195-12MST requires verification that the application circuit operates within the 50mA current limit and 24VDC maximum voltage rating. Applications designed for the BP12YT's 100mA at 5VDC specification must confirm that the 195-12MST's reduced current rating is acceptable. The piano actuator mechanism differs from the slide actuator, requiring mechanical clearance validation in the PCB assembly.

Frequently Asked Questions (FAQ)

Q: Can the 195-12MST directly replace the BP12YT in all applications?

A: Direct replacement is valid only when the application current requirement does not exceed 50mA and the circuit voltage does not exceed 24VDC. The mechanical actuator difference (piano versus slide) requires clearance verification in the assembly.

Q: What is the primary reason for substitution?

A: The BP12YT is classified as obsolete. The 195-12MST provides functional equivalence with active product status and current manufacturing availability.

Q: Are there differences in mounting footprint?

A: Both parts use identical 0.100" (2.54mm) pitch through-hole, right-angle PC pin termination. Height above board differs by 0.004" (0.10mm), which is negligible for standard PCB assembly.

Q: How do the electrical ratings compare?

A: The BP12YT is rated for 100mA at 5VDC with 1,000 electrical cycles. The 195-12MST is rated for 50mA at 24VDC with 2,000 electrical cycles. The substitute has lower current capacity but higher voltage rating and extended cycle life.

Q: What compliance certifications apply?

A: Both parts are RoHS compliant and REACH unaffected. The 195-12MST carries ROHS3 certification, representing current compliance standards.

Q: Does packaging differ between these parts?

A: The BP12YT packaging is not specified in available data. The 195-12MST is supplied in tube packaging.